<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon
        slot="left"
        name="arrow-left"
        @click="$router.back()"
      />
    </van-nav-bar>
    <!-- /导航栏 -->
    <!-- 登陆表单 -->
    <van-form ref="loginForm" @submit="onSubmit">
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
      >
        <i slot="left-icon" class="icon tt-shouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="icon tt-wode"></i>
        <template #button>
          <!-- time:倒计时时间 -->
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 60"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            native-type="button"
            round
            size="small"
            type="default"
            @click="onSendSms"
          >
            发送验证码
          </van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button
          class="login-btn"
          block
          type="info"
          native-type="submit"
        >
          登录
        </van-button>
      </div>
    </van-form>
    <!-- /登陆表单 -->
  </div>
</template>

<script>
import { login, sendSms } from '../../api/user'
export default {
  name: 'LoginIndex',
  components: {},
  props: {},
  data() {
    return {
      user: {
        // 手机号
        mobile: '',
        // 验证码
        code: ''
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      // 是否展示倒计时
      isCountDownShow: false
    }
  },
  computed: {},
  watch: {},
  created() {},
  mounted() {},
  // 方法集合
  methods: {
    async onSubmit() {
      // 1、获取表单数据
      const user = this.user

      // TODO:2、表单验证
      // 在组建中必须通过 this.$toast 来调用
      this.$toast.loading({
        message: '登陆中...',
        // 禁用背景点击
        forbidClick: true,
        // 持续时间，默认是2000，如果是0，则持续展示
        duration: 0
      })

      // 3、提交表单请求登录
      try {
        const { data } = await login(user)
        this.$store.commit('setUser', data.data)

        // 清除 layout 的缓存
        this.$store.commit('removeCachePage')

        this.$toast.success('登陆成功')

        // 登录草稿，跳转回原来页面
        // this.$router.push('/')
        this.$router.push(this.$route.query.redirect || '/')
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登陆失败,请稍后重试')
        }
      }
      // 4、根据请求响应结果处理后续操作
    },
    async onSendSms() {
      // 1.校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)
      }
      // 2.验证通过，显示倒计时
      this.isCountDownShow = true
      // 3.请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁了，请稍后重试！')
        } else {
          this.$toast('发送失败，请稍后重试！')
        }
      }
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  .icon {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 160px;
    height: 46px;
    line-height: 46px;
    background-color: #fffffd;
    font-size: 20px;
    color: #666;
    border: none;
  }
  .login-btn-wrap {
    margin: 53px 32px 0 32px;
    border-radius: 10px;
    overflow: hidden;
    .login-btn {
      background-color: #7cc0ff;
      border: none;
    }
  }
}
</style>
